JP2012199497A - Light emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce color phase irregularity in a light emitting device for emitting light by mixing light of plural colors.SOLUTION: A light emitting device 1 comprises an LED 3, and a wavelength conversion member 5 for converting light emitted from the LED 3 into light with a wavelength of a different color. The wavelength conversion member 5 has a gutter-like shape projecting on a light guide face side. By such a constitution, a large amount of light emitted from the LED 3 is incident on the wavelength conversion member 5 at a right angle. Because an optical path length difference of light propagating through the wavelength conversion member 5 becomes small, the light incident on the wavelength conversion member 5 is converted into light with a wavelength at a similar level. Therefore, color phase irregularity of the light guided from the wavelength conversion member 5 can be reduced. Also, the wavelength conversion member 5 is formed into a gutter-like shape and therefore the wavelength conversion member 5 is also arranged on the side of the LED 3. Thereby, the light can be also emitted on the side of the light emitting device 1, and distribution of light radiated on the side can be controlled by adjusting a curvature of the wavelength conversion member 5.

Description

  The present invention relates to a light emitting device using a solid light emitting element such as an LED (Light emitting diode).

  2. Description of the Related Art Conventionally, light emitting devices that emit light by mixing light of a plurality of colors using an LED and a wavelength conversion member are known. Such a light emitting device includes, for example, as shown in FIG. 12, an LED 10 that emits blue light, a wavelength conversion member 20 that converts blue light from the LED 10 into yellow light, a reflector 30 that reflects light, Is provided. The yellow light generated by the wavelength conversion member 20 is mixed with the blue light that has not been wavelength-converted by the wavelength conversion member 20 to become white light, and is derived from the wavelength conversion member 20 (see, for example, Patent Documents 1 to 4). ).

JP 2008-270701 A JP 2009-060094 A JP 2008-218485 A JP 2008-123969 A

  However, in the light emitting device as described above, the optical path length of the light propagating through the wavelength conversion member 20 varies depending on the irradiation angle of the light emitted from the LED 10. For example, as shown in FIG. 12, the light emitted from the LED 10 substantially vertically passes through the wavelength conversion member 20 with the optical path length d1, whereas the light emitted obliquely from the LED 10 passes through the wavelength conversion member 20. Through the optical path length d2. At this time, since d1 <d2, the light emitted obliquely from the LED 10 is more wavelength-converted than the light emitted substantially vertically from the LED 10. As described above, the light emitted from the LED 10 is likely to cause color unevenness because the degree of wavelength conversion differs depending on the irradiation angle. Moreover, since the reflector 30 is arrange | positioned at the side of LED10, this light-emitting device cannot irradiate light to the side of an apparatus.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a light-emitting device that can emit light with less color unevenness and can distribute light to the side of the light-emitting device.

  The light-emitting device of the present invention includes a plurality of solid-state light-emitting elements mounted on a wiring board, a plurality of light-emitting groups in which elements adjacent to each other of the plurality of solid-state light-emitting elements form groups, A plurality of transparent sealing members covering the light guide surfaces of the solid light emitting elements included in the light emitting group, and the light guide surfaces of the transparent sealing members for each of the transparent sealing members are emitted from the solid light emitting elements. A plurality of wavelength conversion members that convert light into light of a different color for each of the light emitting groups, and each of the plurality of wavelength conversion members is configured in a convex bowl shape on the light output surface side. Features.

  Each of the plurality of wavelength conversion members is directly or through a transparent member that transmits light derived from the transparent sealing member, through an air layer, or through the transparent member and the air layer. It is preferable to cover the light guide surface of the transparent sealing member.

The plurality of solid state light emitting devices are mounted in an array or matrix on the wiring board,
It is preferable that the transparent sealing member and the wavelength conversion member have an elongated shape or a planar shape, respectively.

  The light emitting device preferably includes a light diffusing panel for diffusing light on at least some of the light guide surfaces of the plurality of wavelength conversion members.

  The color of light derived from the plurality of wavelength conversion members is preferably the three primary colors of light.

  Each of the plurality of transparent sealing members is preferably configured in a bowl shape that is convex toward the light-exiting surface side.

  According to the light emitting device of the present invention, since the wavelength conversion member has a bowl shape, more light emitted from the solid state light emitting element is perpendicular to the wavelength conversion member as compared to the conventional light emitting device. Incident. Thereby, since the optical path length difference of the light propagating through the wavelength conversion member is reduced, the light incident on the wavelength conversion member is wavelength-converted to the same extent. Therefore, the color unevenness of the light derived from the wavelength conversion member can be reduced. In addition, since the wavelength conversion member has a bowl shape, the wavelength conversion member is also disposed on the side of the solid light emitting element, so that it is possible to irradiate the side of the apparatus with light and the wavelength. By adjusting the curvature of the conversion member, the light distribution of the light irradiated to the side can be controlled.

1 is an exploded perspective view of a light emitting device according to a first embodiment of the present invention. FIG. 3 is a cross-sectional view of the light emitting device. The xy chromaticity diagram of the light which the said light-emitting device emits. (A), (b), (c) is a cross-sectional view of the light emitting device according to the first modification of the embodiment. The disassembled perspective view of the light-emitting device which concerns on the 2nd modification of the said embodiment. The disassembled perspective view of the light-emitting device which concerns on the 3rd modification of the said embodiment. (A) is a perspective view of the lighting fixture using the light-emitting device which concerns on the said embodiment, (b) is a cross-sectional view of the lighting fixture. (A) is a perspective view of the modification of the said lighting fixture, (b) is a cross-sectional view of the lighting fixture. The disassembled perspective view of the light-emitting device which concerns on the 2nd Embodiment of this invention. FIG. 3 is a cross-sectional view of the light emitting device. The perspective view of the lighting fixture using the said light-emitting device. The cross-sectional view of the conventional light-emitting device.

  A light emitting device according to a first embodiment of the present invention will be described with reference to FIGS. This light-emitting device uses LEDs as solid-state light-emitting elements.

  As shown in FIGS. 1 and 2, the light emitting device 1 includes a plurality of LEDs 3 mounted on a rectangular wiring board 2. These LEDs 3 are all point light sources, and the LEDs 3 adjacent to each other form a group, and form three light emitting groups 3a, 3b, and 3c. For example, LED 3 that emits near-ultraviolet light having a peak wavelength of about 405 nm may be used. The light emitting groups 3a, 3b, and 3c extend along the longitudinal direction of the wiring board 2 and are disposed adjacent to each other. The LEDs 3 belonging to each group are mounted on the wiring board 2 in an array form (staggered arrangement), and the light guide surfaces are covered with a transparent sealing member 4 for each group. Each of the three transparent sealing members 4 has a bowl shape with a convex side on the light guide surface, and the light guide surface of the transparent seal member 4 is covered with a wavelength conversion member 5 for each transparent seal member 4. Similar to the transparent sealing member 4, these wavelength conversion members 5 are each configured in a bowl shape in which the light output surface side is convex. The three wavelength conversion members 5 include a wavelength conversion member 5 (R: red), a wavelength conversion member 5 (G: green), and a wavelength conversion member 5 (B: blue). The wavelength conversion member 5 (R) includes a red phosphor that converts near-ultraviolet light from the LED 3 into red light. The wavelength conversion member 5 (G) includes a green phosphor that converts the wavelength of near ultraviolet light from the LED 3 into green light. The wavelength conversion member 5 (B) includes a blue phosphor that converts the wavelength of near ultraviolet light from the LED 3 into blue light. The wavelength conversion members 5 (R), 5 (G), and 5 (B) are arranged at positions corresponding to the light emitting groups 3a, 3b, and 3c, respectively.

  The wiring board 2 is configured using a metal such as aluminum having a high thermal conductivity or a resin such as glass epoxy as a base material, and a white solder resist having a thickness of 10 μm or more is applied to the surface thereof. The wiring board 2 includes a light reflecting member (not shown) having a high light reflectance on the LED mounting surface. The light reflecting member is made of, for example, silver or aluminum. Further, the wiring board 2 includes a wiring pattern (not shown) for supplying power to the LEDs 3. Note that the structure and constituent materials of the wiring board 2 are not limited to those of the present embodiment. Moreover, the wiring board 2 includes a holding structure (not shown) for attaching the wiring board 2 to a ceiling, a wall, or the like.

  The number of LEDs 3 mounted on the wiring board 2 is not particularly limited, and is appropriately determined according to the required light flux. The LED 3 may be mounted face-up on the wiring pattern of the wiring board 2 or may be flip-chip mounted on the wiring pattern.

  The transparent sealing member 4 is made of a translucent material having a refractive index of 1.2 to 1.7. The translucent material is, for example, a transparent silicone resin, a transparent epoxy resin, or transparent glass. The shape of the transparent sealing member 4 is not necessarily limited to a bowl shape, and may be a semi-ellipsoidal shape, for example.

  The wavelength conversion member 5 is composed of a translucent material such as a transparent silicone resin or transparent glass as a base material. The refractive index of this translucent material is made larger than the refractive index of the material constituting the transparent sealing member 4. The wavelength conversion member 5 is disposed in a state of being in direct contact with the light guide surface of the transparent sealing member 4. Such a structure is obtained by potting the transparent sealing member 4 in the concave portion of the bowl-shaped wavelength conversion member 5, inverting these members to seal the LED 3, and then curing the transparent sealing member 4. It is done.

  The light emitting device 1 includes a drive driver (not shown) that controls the light emission of the LED 3. The drive driver has a light control device composed of a switch, a microcomputer, and the like, and is connected to a commercial power source and is electrically connected to the LED 3 via a wiring pattern. The drive driver performs on / off control and dimming control of the LED 3 by controlling supply of power obtained from the commercial power source to the LED 3. A plurality of drive drivers are provided, and are composed of three types that collectively control the LEDs 3 belonging to each of the light emitting groups 3a, 3b, and 3c.

  The operation of the light emitting device 1 of the present embodiment configured as described above will be described. The light emitted from the LED 3 passes through the transparent sealing member 4 and enters the wavelength conversion member 5. At this time, as indicated by a broken line arrow in FIG. 2, most of the light incident on the wavelength conversion member 5 is incident on the wavelength conversion member 5 at a right angle because the wavelength conversion member 5 has a bowl shape. . Thereby, since the optical path length difference of the light which propagates the wavelength conversion member 5 becomes small, each incident light is wavelength-converted to the same extent. Therefore, the light derived from the wavelength conversion member 5 is light with less color unevenness. The light incident on the wavelength conversion member 5 collides with the phosphor molecules contained in the wavelength conversion member 5 and is scattered in various directions. Thereby, the luminance unevenness of the wavelength conversion member 5 is reduced, and the wavelength conversion member 5 can be a planar light source that emits uniform light over the entire surface.

  The wavelength conversion member 5 converts the wavelength of near-ultraviolet light emitted from the LED 3 into light of different colors (red, green, and blue) for each of the light emitting groups 3a, 3b, and 3c. Thereby, the color of the light derived from the wavelength conversion member 5 becomes the three primary colors of light. Since these wavelength conversion members 5 (R), 5 (G), and 5 (B) are arranged adjacent to each other, they are easily mixed and become white light with little color unevenness.

  If the color tone of the white light derived from the wavelength conversion member 5 is the color tone inside the triangle connecting the three points of red, green and blue in the xy chromaticity diagram shown in FIG. 3, the drive driver corresponding to each color Can be freely adjusted using For example, it is derived from the wavelength conversion member 5 by increasing the output of these LEDs 3 and increasing the red light derived from the wavelength conversion member 5 (R) using a drive driver that controls the LEDs 3 belonging to the light emitting group 3a. White light can be reddish white light. The color tone and brightness of the white light derived from the wavelength conversion member 5 are also adjusted by changing the type and concentration of the phosphor contained in the wavelength conversion member 5, the concentration ratio with other phosphors, and the like. obtain.

  Moreover, the wavelength conversion member 5 is arrange | positioned also to the side of LED3 because the wavelength conversion member 5 is made into the bowl shape. As a result, it is possible to irradiate light to the side of the light emitting device 1 and control the light distribution of the light irradiated to the side by adjusting the curvature of the bowl-shaped structure of the wavelength conversion member 5. can do.

  Further, by making the refractive index of the translucent material constituting the wavelength converting member 5 larger than the refractive index of the translucent material constituting the transparent sealing member 4, the light emitted from the LED 3 can be It is possible to prevent total reflection at the interface of the member (see FIG. 2). Thereby, the light extraction efficiency of the light emitting device 1 can be improved. Further, part of the light scattered by the wavelength conversion member 5 and the light totally reflected at the interface between the wavelength conversion member 5 and the outside (atmosphere) is totally reflected at the interface. Thereby, the light which returns to the internal direction of the light-emitting device 1 can be reduced.

  Since the light reflecting member is provided on the LED mounting surface of the wiring board 2 without being totally reflected at the interface, the light reflecting member is provided on the LED mounting surface of the wiring board 2, and the light of the light emitting device 1 again. Can head outward. Thereby, the light extraction efficiency of the light emitting device 1 can be improved.

  Further, since the wiring board 2 is made of a material having high thermal conductivity, the wiring board 2 can generate heat generated by light emission of the LED 3 and heat generated by wavelength conversion by the phosphor in the wavelength conversion member 5. 2 can dissipate heat to the outside world. Thereby, since the abnormal temperature rise inside the light-emitting device 1 can be prevented, the lifetime of the LED 3 can be extended, and thermal deterioration of the phosphor can be suppressed.

  In addition, since the LEDs 3 are mounted on the wiring board 2 in an array (staggered arrangement), a distance can be formed between the LEDs 3 adjacent to each other, so that each LED 3 can efficiently dissipate heat generated by light emission. It becomes possible. In addition, since the LEDs 3 are evenly arranged, unevenness in luminance is less likely to occur in the light emitted from the LEDs 3.

  The light emitting device 1 may include an ultraviolet filter (not shown) that covers the light guide surface of the light emitting device 1. This ultraviolet filter is an optical filter for wavelength control made of resin, glass or the like, and cuts near ultraviolet light. By providing an ultraviolet filter on the light outgoing surface of the light emitting device 1, near ultraviolet light can be cut from the light irradiated by the light emitting device 1. As a result, the light emitting device 1 can be used safely without adversely affecting the user of the light emitting device 1.

  Next, a light emitting device according to a first modification of the present embodiment is shown in FIGS. The light emitting device 1 shown in FIG. 4A includes a bowl-shaped transparent member 6 a that transmits light derived from the transparent sealing member 4 between the transparent sealing member 4 and the wavelength conversion member 5. Such a structure is obtained by potting the transparent sealing member 4 in the concave portion of the transparent member 6 a, reversing these to seal the LED 3, and then covering the light guide surface of the transparent member 6 a with the wavelength conversion member 5. It is done. The transparent member 6a is comprised from the translucent material with high heat conductivity, for example, is comprised from transparent glass. By providing the transparent member 6a, it is possible to efficiently dissipate heat generated in the wavelength conversion member 5 due to the wavelength conversion by the phosphor to the wiring substrate 2 via the transparent member 6a and the transparent sealing member 4. Therefore, the thermal deterioration of the phosphor can be suppressed. The refractive index of the material constituting the transparent member 6 a is set larger than the refractive index of the material constituting the transparent sealing member 4 and smaller than the refractive index of the material constituting the wavelength conversion member 5. Thereby, since it can prevent that the light radiate | emitted from LED3 in the interface of the transparent sealing member 4 and the transparent member 6a or the interface of the transparent member 6a and the wavelength conversion member 5 is totally reflected, the light-emitting device 1 The light extraction efficiency can be improved. Moreover, it is possible to suppress the light converted in wavelength by the wavelength conversion member 5 from returning to the inner direction of the light emitting device 1.

  The light emitting device 1 illustrated in FIG. 4B includes an air layer 6b between the transparent sealing member 4 and the wavelength conversion member 5. Such a structure can be obtained by sealing the LED 3 with the transparent sealing member 4 and then covering the light guide surface of the transparent sealing member 4 with the wavelength conversion member 5 by providing a gap. By providing the air layer 6b, it is possible to prevent the light emitted from the LED 3 from being totally reflected at the interface between the wavelength conversion member 5 and the air layer 6b, thereby improving the light extraction efficiency of the light emitting device 1. Can do. Moreover, it is possible to suppress the light converted in wavelength by the wavelength conversion member 5 from returning to the inner direction of the light emitting device 1. Furthermore, since the air layer 6b has a heat insulating action, the heat generated with the wavelength conversion in the wavelength conversion member 5 is difficult to propagate to the transparent sealing member 4, and thus the thermal deterioration of the transparent sealing member 4 is suppressed. Can do.

  The light emitting device 1 shown in FIG. 4C includes a transparent member 6a and an air layer 6b between the transparent sealing member 4 and the wavelength conversion member 5 in order from the LED3 mounting surface side. In such a structure, after the transparent sealing member 4 is potted in the concave portion of the transparent member 6a, the LED 3 is sealed by reversing them, and then the light conversion surface of the transparent sealing member 4 is provided with the gap so that the wavelength conversion member 5 is provided. It is obtained by coating with. By providing the transparent member 6a and the air layer 6b, the light emitted from the LED 3 is totally reflected at the interface between the transparent sealing member 4 and the transparent member 6a and at the interface between the air layer 6b and the wavelength conversion member 5. Therefore, the light extraction efficiency of the light emitting device 1 can be improved. Further, the light converted in wavelength by the wavelength conversion member 5 can be prevented from returning in the internal direction of the light emitting device 1. Furthermore, since heat generated due to wavelength conversion in the wavelength conversion member 5 is difficult to propagate to the transparent sealing member 4, thermal deterioration of the transparent sealing member 4 can be suppressed.

  Next, a light emitting device according to a second modification of the present embodiment is shown in FIG. The light-emitting device 1 shown in FIG. 5 includes LEDs 3 arranged in a matrix (planar shape) for each of the light-emitting groups 3a, 3b, and 3c, and a transparent sealing member 4 and a wavelength conversion member 5 that are both in a planar view. And comprising. The light-emitting device 1 according to this modification has the same structure as the light-emitting device 1 shown in FIG. 1 except that the arrangement of the LEDs 3 and the structure of the transparent sealing member 4 and the structure of the wavelength conversion member 5 are different. According to this modification, the light emitting device 1 can be a planar light source in which each color light emitting surface has a substantially square top view.

  Next, a light emitting device according to a third modification of the present embodiment is shown in FIG. The light-emitting device 1 shown in FIG. 6 has two light-emitting groups 3a, 3b, and 3c, and the LEDs 3 that are linearly arranged for each of the light-emitting groups 3a, 3b, and 3c. A transparent sealing member 4 and a wavelength conversion member 5. Here, the light emitting groups 3a, 3b, and 3c are arranged side by side so that the arrangement of the light emitting groups 3a-3b-3c is repeated twice. The light-emitting device 1 according to this modification has the same structure as the light-emitting device 1 shown in FIG. 1 except that the arrangement of the LEDs 3 and the structure of the transparent sealing member 4 and the structure of the wavelength conversion member 5 are different. According to this modification, since the light emitting area of each wavelength conversion member 5 is smaller than that of the light emitting device 1 shown in FIG. 1, light of different colors derived from the wavelength conversion members 5 adjacent to each other are emitted from each other. It becomes easy to mix. Therefore, the color unevenness of the white light derived from the light emitting device 1 can be further reduced.

  FIGS. 7A and 7B show an example in which a lighting fixture is configured using a plurality of light emitting devices 1 as described above. The luminaire 10 includes four light emitting devices 1 arranged in tandem, and these light emitting devices 1 are each held by a housing 7 via a holding structure (not shown) provided on the wiring board 2. . The housing 7 is made of a material having a light weight and high rigidity, and is made of, for example, a polyethylene terephthalate (PET) resin. The casing 7 is a rectangular frame with one side open, and the light emitting device 1 is housed in the center of the recess with the light output surface side facing the opening surface of the casing 7. A flat reflector 7a is obliquely installed so as to connect the edge of the opening of the body 7. The reflecting plate 7a is made of a material having a high light reflectance, for example, an aluminum plate. The reflecting plate 7a reflects the light irradiated to the side of the light emitting device 1 and directs the light toward the outside of the lighting fixture 10, as indicated by broken line arrows in FIG. Improve light extraction efficiency. According to the lighting fixture 10, the line lighting fixture which can irradiate white light with few brightness irregularities and color irregularities can be obtained. In addition, the number of the light-emitting devices 1 mounted on the lighting fixture 10 and the arrangement of the light-emitting devices 1 are not limited to those of the present embodiment. Further, the materials constituting the housing 7 and the reflecting plate 7a and their structures are not limited to the above.

  As shown in FIGS. 8A and 8B, the luminaire 10 may include a light diffusing panel 8 that diffuses light on the light derivation surface. The light diffusion panel 8 is made of, for example, polycarbonate resin or acrylic resin in which light diffusion particles such as calcium carbonate and acrylic are dispersed. Alternatively, the light diffusing panel 8 is configured by forming a fine concavo-convex structure by frosting or the like on at least one of the front and back surfaces of the polycarbonate resin and the acrylic resin. By providing the light diffusion panel 8, it is possible to diffuse red light, green light, and blue light from the wavelength conversion members 5 (R), 5 (G), and 5 (B) in various directions. Therefore, as compared with the lighting fixture 10 shown in FIG. 7, the color unevenness and luminance unevenness of the white light emitted from the lighting device 10 can be further reduced. Further, when the light diffusing panel 8 is made of a material having a relatively high hardness, the light diffusing panel 8 can also function as an outer shell member that protects the lighting fixture 10 from an impact or the like. In the present embodiment, the light diffusing panel 8 is disposed so as to cover the entire light guide surface of the luminaire 10, but may be disposed so as to cover a part of the light guide surface of the luminaire 10. Good.

  According to the above-described embodiment and its modified examples and lighting fixtures using them, the light emitting device 1 and the lighting fixture 10 that can emit white light that can reduce color unevenness and luminance unevenness and can be dimmed and controlled. Obtainable. Moreover, these light-emitting devices 1 and the lighting fixture 10 can irradiate the light which can control light distribution also to the side of an apparatus.

  Next, a light emitting device according to a second embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 9 and 10, the light emitting device 11 includes a plurality of LEDs 3 mounted on the wiring board 2 and divided into three light emitting groups 3a, 3b, and 3c. These LEDs 3 are partitioned by a frame member 9 placed on the wiring board 2 for each of the light emitting groups 3a, 3b, and 3c. The frame member 9 is made of a material having a high light reflectivity such as aluminum, and has a rectangular frame having substantially the same size as that of the wiring board 2 and having both the light incident surface and the light output surface opened, and the inside of the frame And a strip-shaped plate for partitioning. Here, each partitioned region of the frame member 9 has an inverted quadrangular frustum shape in which the opening degree increases toward the light guide surface side. Each partitioned region of the frame member 9 is filled with the transparent sealing member 4. Each of the transparent sealing members 4 seals the LEDs 3 belonging to the light emitting groups 3a, 3b, and 3c, respectively, and is a flat wavelength conversion member so as to cover the light output surfaces of the three transparent sealing members 4 in common. 5 is arranged. The wavelength conversion member 5 includes a wavelength conversion member 5 (R) at a position corresponding to the light emission group 3a, a wavelength conversion member 5 (G) at a position corresponding to the light emission group 3b, and a position corresponding to the light emission group 3c. A wavelength conversion member 5 (B) is provided. The light-emitting device 11 has the same structure as the light-emitting device 1 shown in FIG. 1 except for two points, that is, the point provided with the frame member 9 and the point that the structure of the transparent sealing member 4 and the structure of the wavelength conversion member 5 are different. Is provided.

  The operation of the light emitting device 11 of this embodiment will be described. The light emitted from the LED 3 passes through the transparent sealing member 4 and enters the wavelength conversion member 5. The light that has entered the wavelength conversion member 5 is converted into red light, green light, and blue light in the wavelength conversion members 5 (R), 5 (G), and 5 (B), respectively, and then derived from the wavelength conversion member 5. Is done. Here, since the wavelength conversion members 5 (R), 5 (G), and 5 (B) are arranged adjacent to each other, the red light, the green light, and the blue light easily mix with each other, and the color unevenness Less white light. The light incident on the wavelength conversion member 5 collides with the phosphor molecules contained in the wavelength conversion member 5 and is scattered in various directions. Thereby, the luminance unevenness of the wavelength conversion member 5 is reduced, and the wavelength conversion member 5 can be a planar light source that emits uniform light over the entire surface.

  By making the wavelength conversion member 5 into a flat plate shape having a simple structure, the wavelength conversion member 5 can be easily produced as compared with the bowl-shaped wavelength conversion member 5 used in the light emitting device 1. Thereby, the effort concerning manufacture of the light-emitting device 11 can be reduced.

  The frame member 9 is made of a material having a high light reflectivity, and the partitioned region is formed into an inverted quadrangular pyramid shape, so that the LED 3 extends to the side of the LED 3 as indicated by the broken arrow in FIG. The emitted light can be reflected and incident on the wavelength conversion member 5. Thereby, the light extraction efficiency of the light emitting device 11 can be improved.

  An example in which a lighting fixture is configured by using a plurality of light emitting devices 11 as described above is shown in FIG. The luminaire 11a includes four light emitting devices 11 arranged in tandem, a housing 7 that holds the light emitting device 11, and a reflecting plate 7a that reflects light emitted from the light emitting device 11. The housing 7 and the reflecting plate 7a are the same as those used in the lighting fixture 10. As described above, the lighting fixture 11a can be manufactured more easily than the lighting fixture 10 because the labor required for manufacturing the light emitting device 11 is less.

  According to the light emitting device and the lighting fixture of the present embodiment, the light emitting device 11 and the lighting fixture 11a that can emit white light that can reduce color unevenness and luminance unevenness and can be dimmed and controlled are used as the light emitting device 1 and the lighting fixture. Compared to 10, it can be easily produced.

  The light emitting device according to the present invention is not limited to the above embodiment, and various modifications can be made. For example, the solid light-emitting element is a near-ultraviolet LED in the present embodiment, but is not limited to the near-ultraviolet LED, and may be an LED that emits light of other colors such as a blue LED, or an organic EL. It may be an element. Further, the solid-state light-emitting element does not necessarily need to be composed of one type of solid-state light-emitting element, and different types of solid-state light-emitting elements may be used for each light-emitting group. An element may be used. In the present embodiment, the light emitting device is configured to irradiate white light, but may be configured to irradiate light of other colors. Further, the phosphor contained in the wavelength conversion member is not limited to that of the present embodiment, and may be other phosphors, and the substance responsible for wavelength conversion is not limited to the phosphor. For example, phosphorescence It may be a body. The wavelength conversion member may include an optical filter that transmits only light having a specific wavelength out of the light emitted from the solid state light emitting device. Furthermore, the arrangement of the wavelength conversion member is not limited to that of the present embodiment.

1, 11 Light-emitting device 2 Wiring board 3 Solid light-emitting element (LED)
3a, 3b, 3c Light emission group 4 Transparent sealing member 5, 5 (R), 5 (G), 5 (B) Wavelength conversion member 6a Transparent member 6b Air layer 8 Light diffusion panel

Claims (6)

A plurality of solid state light emitting devices mounted on a wiring board;
A plurality of light emitting groups in which adjacent elements of the plurality of solid state light emitting elements form a group; and
A plurality of transparent sealing members that cover the light-derived surfaces of the solid-state light-emitting elements included in the light-emitting group for each light-emitting group;
A plurality of wavelength conversion members that cover the light-derived surface of the transparent sealing member for each of the transparent sealing members, and convert the wavelength of the light emitted from the solid-state light emitting element into light of a different color for each of the light emitting groups; With
Each of the plurality of wavelength conversion members is configured in a bowl shape that is convex toward the light guide surface side.   Each of the plurality of wavelength conversion members is directly or through a transparent member that transmits light derived from the transparent sealing member, through an air layer, or through the transparent member and the air layer. The light emitting device according to claim 1, wherein the light guide surface of the transparent sealing member is covered. The plurality of solid state light emitting devices are mounted in an array or matrix on the wiring board,
The light emitting device according to claim 1, wherein the transparent sealing member and the wavelength conversion member are each formed in a long shape or a planar shape.   4. The light emitting device according to claim 1, wherein a light diffusing panel that diffuses light is provided on at least a part of the light guide surfaces of the plurality of wavelength conversion members. 5.   5. The light emitting device according to claim 1, wherein the color of light derived from the plurality of wavelength conversion members is the three primary colors of light.   6. The light-emitting device according to claim 1, wherein each of the plurality of transparent sealing members is configured in a bowl shape that protrudes toward the light guide surface side.